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f2fs: skip GC if possible when checkpoint disabling 

If the number of unusable blocks is not larger than
unusable capacity, we can skip GC when checkpoint
disabling.

Signed-off-by: Weichao Guo <guoweichao@oppo.com>
Signed-off-by: Chao Yu <chao@kernel.org>
[Jaegeuk Kim: Fix missing gc_mode assignment]
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Weichao Guo 2022-05-07 00:28:14 +08:00 committed by Jaegeuk Kim
parent 7141912962
commit 2880f47b94
1 changed files with 7 additions and 2 deletions
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9
fs/f2fs/super.c
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@ -2058,7 +2058,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
{
unsigned int s_flags = sbi->sb->s_flags;
struct cp_control cpc;
unsigned int gc_mode;
unsigned int gc_mode = sbi->gc_mode;
int err = 0;
int ret;
block_t unusable;
@ -2069,9 +2069,13 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
}
sbi->sb->s_flags |= SB_ACTIVE;
/* check if we need more GC first */
unusable = f2fs_get_unusable_blocks(sbi);
if (!f2fs_disable_cp_again(sbi, unusable))
goto skip_gc;
f2fs_update_time(sbi, DISABLE_TIME);
gc_mode = sbi->gc_mode;
sbi->gc_mode = GC_URGENT_HIGH;
while (!f2fs_time_over(sbi, DISABLE_TIME)) {
@ -2097,6 +2101,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
goto restore_flag;
}
skip_gc:
f2fs_down_write(&sbi->gc_lock);
cpc.reason = CP_PAUSE;
set_sbi_flag(sbi, SBI_CP_DISABLED);